Steam-pump.



K. DOUGAN.

STEAM PUMP.

APPLICATION FILED JAN. 16, 1909.

Patented 0013.20, 1914.

2 sums-SEEM 1.

W/TNESSES: W

THE NORRIS PETERS CO.. PHOTU-LITHD-v WASHINGIDN. D. L

K. DOUGAN.

STEAM PUMP.-

APPLICATION FILED JAILIB, 1909.

Patented Oct. 20, 1914.

2 SHEETS-SHEET 2.

wMWPNHN W/ TNESSES THE NORRIS PETERS CO1. PHOTOLITHO., WASHINGTON. D. C.

- It is well known that the loss of steam due KENNEDY nouean, or ivirunn'azeoms,MiNnEso'rAQ V, STEAM-PUMP;

To all whom it may concern:

Be it known that l, KENNEDY DoUeAN, a citizen of the United States, and resident of the city of Minneapolis, county of Hennepin, and State of Minnesota, have invented certain new and useful Improvements in Steam-Pumps; and I do hereby declare the 1 following to be a full, clear, and-exact description ofthe invention, such as will enable others skilled in the art to which it 'appertains to make and use the same.

i The object of the invention is to -provide a single acting steam pump in which the percentage of piston leakage in both steam v and water cylinder, will be the same whether the pump is making the maximum or minimum number of strokes per unit of time.

to piston leakage is considerable, and since the leakage is in proportion to the time steam is acting on the piston, it follows that the percentage of leakage Willbe ten times as great when a pump is making one stroke per minute as when maklng ten strokes per minute.

In the invention herein-disclosed, one.

"stroke of the pump,"'that is the working stroke, is always made at the maximum prac- I ticable speed, and the speed of the return stroke, being efiected by fluid pressure on a relatively small piston, saidfluid pressure being controlled manually by a throttle valve or automatically by a pressure or altitude responsive device, will be at a diminished rate regulable at will.

"In the accompanying drawings, Figure l is a diagrammatic view, in vertical longitudinal section, of a-single acting pump. em-

bodying the invention, the steam end being indicated by dotted lines; Fig. 2 isavertical cross-section on linen-b of Fig. 1; Fig. 3} shows means for working the pump, in one direction by air pressure; Fig. 4 shows means for worklng the pump in one d1rection by steam pressure; Fig. 5 is a vertical cross-section on line 0- 03 of Fig. at. v

In the drawings, the water end oft-he. pump is shown in a special form which is well adapted to the purposes of this inven-; tion, but the invention is applicable to other The steam? end of the pump is represented by the cylinsupply pipe 46, and throt- 5 through pipe 30 and; leak around piston rod as fast-asit leaks back around the piston 14. y

and different pump structures.

der 1, piston 2, tle 47.

7 Specification of Letters Patent.

valve 24: will be wide open.

TED STATES PAIENI F CE- Patented o e'a fiei i. Application filed January 16,1909. Seria1No.472,G67. c i I 6. Said pipe maybe much; longer than shown. At its distant end it is connected to I a valve chamber 7 in'which are liftvalves 8. Sand chamber above the valves 8 issconnected to a stand-pipe -9 near' the bottom thereof.. .The diameter. of the stand-pipe greaterthan that of the should :be not much water cylinderB.

' Connected to the pipe 6 preferably adjacent thevalve chamber 7,

at any point, but

is the induction pipe 11. Pipe 11 approaches pipe 6on a curve or at an angle, and prefer ably in'a direction toward ,the water .cylinder. Its lower end is enlarged as at and provided with foot-valves 12.-

13 is the level of the water supply." In this pump) (to the right) ysteam pressure, and back by water, air or steam pressure. 'The ar rangeme'nt shown in Fig..1 is for water prespass'22, in which are a hand-valve- 23am an automatically operated fvalve 24.; Thelatter has a short crank-arm connected by a to the stand-pipe 9. The parts. are so the piston 2 is driven in "Sure. -As, onaccount ofthe valves 8, the

v Cylinder 15 is practically; coextensivewith pipe 6, and terminates in:

a valve-chamber 19 containing valvesQO... Above the valves-said chamber is connected to the stand-pipe'9 by a -connection21'w Connected around said valvesQO is a byso rod 26 with a pressure-responsivedevice 27,. p (indicated) that is'connected by a pipe 28 adjusted that when there is less than/the required pressure in the stand-pipe The end of the cylinder 3 atwhich-thepiston-rod enters is simply boredto fit the piston rod; no packing is necessary. An up- I wardlyextending pipe or chamber 29 -is connected to cylinder?) near the end of thelat 'ter. Said pipe orchamber is provided with} a pipe "80 open to atmosphere. The func-' tion of the chamber I 29 is to provide water "packing or a-water seal for the'piston rod and head. Water will accumulate behind the piston 14 through leakage paStsaidpis l I ton in its forward stroke. When the chamber "becomes filled, water gWill overflow The} operation, of the -Water end of the I l pump is as follows: Starting with the pistons at the positionv shown, the hand-valve 23 being open, and there being a head of water in the stand-pipe 9, the water pressure is transmitted through valves 23 and 24 and pipe 22 into the return piston cylinder drives back the piston 16 and with it the main piston rod 5 and pistons 2 and 14. \Vater is drawn up through the 1nducsteam leakage aroundthe piston is minicylinder 15.

mized. Water is driven from pipe 6 past the head-valves 8 and enters the stand-pipe 9. The waterpressure again drives the pistons to the other end, and soon. During the out strokethe water ahead of. the return piston 16 passes partly through pipe 22 and partly through the checkxvalves 20. I

The function of the hand valve'23 is to enable the operator .to controlthe speed at which the pump pistons return, thereby con trolling the number of beats of the pump per unit of time. This valve may be dispensed with, however, if the delayed valve motion shown in my copending applications Serial Numbers 472,670an'd 47 6,671, filed on even date herewith, on steam pumps be employed. The function of valve 24 is the same 'as'that of valve 23, but it .is adapted to be-governed by changing pressures in the stand-pipe :9. For example, when the said pressure exceedsa certain amount, -.the device 27 turns thevalve 24 toward closed po- 811310111; thischokes the flow of water through said valve and causes the pump pistons to return more slowly. This device also may be dispensed with if the above named de-Z vices are used on the steam valves of thef pump. 7

chamber communicating with the return Such a device is shown in Fig. 3. j 532 designates itheqfreturn cylinder which isclosed at 33, and has a- .port 34 opening into anair-chamber 35. To prevent leakage around the piston 36, a bodyof water is placed between the piston and the air. 37 "is a pipe leading to a source of water' under pressure, such as the standpipe. Initially,=the compressed air is pumped *in through an air pipe 38. The operationwillibe obvious. r H i The feature of the invention whereby the pistons are actuated in one direction by water'pressure works aneconomy, as .it will.

be obviousthat to employ steam pressurein waste of steam. But steam may be employed for returning the pistons when there is not a sufiicient head of water in standp1pe9. In my copending applications Serial Numbers 472,670 and 472,671, filed 011 even date herewith, the steam for this purpose is admittedto the main steam cylinder.

In Fig. 4 of the present drawings, a smaller and separate cylinder 40 is provided, having a piston 41 therein, whose rod 42 is secured to the main piston rod 5, as shown. Cylinder 40 is extended and connected with the valve chamber 19 the same as shown in Fig. 1. In said cylinder, just beyond the end of the stroke of piston 41, a gate valve 43 is placed. A steampipe 44 is connected 'to the cylinder 40'at 45, and leads to the steam pipe 46 above the throttle 47. In steam pipe 44 is a check-valve 48, openmg in thedirection of the arrow. A bypass 49 is connected around the valve 48 and in it'is connected a hand-valve 50.

To start the pump when stand pipe 9 is empty, let steam into cylinder 40 through valve 50 which will drive piston 41 and connected parts to the left, and warm up cylinder 40. When the water of condensation.

has escaped through open valve 52 carried by the pipe 51, said valve is closed sufiio 1ently.to only allow the water of condensation to escape. Throttle 47 is then opened and the steam in the steam end of the pump drives the parts forward, the check valve 48 is opened by the steam pressure ahead of piston 41,;s0 the steam does not haveto pass backward through valve 50. The pump is thus operatedby steam until there is a high enough head of water in the stand-pipe to return the parts without the aid of steam pressure. The steam valve 50 is closed. and

pump, comprising a pumping piston steamactuated toefiiect its active or water-forcing i stroke at maximum speed, means independ- The pistons may be returned by the ex-; 'pansion of compressed air confined 1n;,a'

ent of the steam for returning the piston at diminished speed and means for regulating :the action of sai returning means to vary the rate 1 of return.

2. A single acting direct acting steam pump, comprising a pump cylinder, a piston therein steam-actuated to effect its outg which the water is pumped; a water con nection, havlng check valves therein, be-

sure-responsive into which the water is pumped by both direct acting steam pump, of a pump cylinder,-a piston and rod therein, an auxiliary cylinder containing a piston, the rod of said piston being operatively connected to the pump piston rod; a stand-pipe into which the Water is pumped; a water connection, having check valves therein, between the stand-pipe and the auxiliary cylinder, a bypass around said check-valves; and a regulating valve in said bypass.

4. The combination, with a single acting direct acting steam pump, of a pump cylinder, a piston and rod therein, an auxiliary cylinder containing a piston, the rod of said piston being operatively connected to the pump piston rod; a stand-pipe'into tween the stand-pipe and the auxiliary cylinder; a bypass around said check-valves; a regulating valve in saidbypass,a presdevice operatively connected to said valve, and a water connection between said device and the stand-pipe.

5. A single acting direct acting steam pump, comprising a pump cylinder, a piston therein steam-actuated to effect its out ward or water-forcing stroke, an auxiliary cylinder and a piston therein operatively connected to the pump piston, means for maintaining a fiuidpressure upon said auxiliary piston sufiicient to actuate the pump piston in the opposite direction to that of the steam stroke thereof at diminished speed, and means for regulating the action of said fluid to vary the rate of movement of the pistons in the direction opposite the steam strokes. 6. A single acting direct acting steam pump, comprising a pump cylinder, a pis ton therein steam-actuated to effect its outward or water-forcing stroke, an auxiliary cylinder and a piston therein operatively connected to the pump piston, a stand-pipe pistons, check valves preventing return of water through the pumping passages, a separate water connection between the standpipe and the auxiliary cylinder at that side of the piston that will actuate said piston steam stroke, and a'regulating valve in said water connection.

7. The combination with a single acting direct acting steam pump, of a pump cylinder, a piston and piston rod therein, an

in the opposite direction to that of the auxiliary cylinder containing a piston,

vice operatively connectedto said valve, a water connection between said devlce and a Stand-Pipe, and a chamber in communica 'tion with the pump cylinder at the end at which the piston rod enters,'for'the purpose specifie 8. The combination with a single acting direct acting steam pump, of a pump cylinder, a piston and piston rod therein, an auxiliary cylindercontaining a piston, the

rod of said piston being operatively connected to-th e pump piston rod, a tank, a

pipe communicating with the pump cyl inder and tank, check valves in said pipe,-

a pipe connecting the water supply and the pump cylinder, check valves in said pipe and closing in opposite directions from those in the pipes leading from the pump cylinder and the tank, a water connection having check valves therein between the tank and the auxiliary cylinder, a by-pass around said check valve, a regulating valve,

for said bypass, a pressure responsive device operatively connected to said valve, a

water connection between said, device and tank, and a chamber in communication with the'pump cylinder at the end at which the piston rod enters, substantially as shown and described, q

' v 'KENNEDY'DOUGAN. Witnesses:

; L. R. CLEMENT, O. G. GUESMEN.

copies of this patent may he obtained for five cents each, by addressing the Commissioner of Intent, 3

Washington, D. 5, 

